IK in 2D: a step further

The next step in using IK and skeletons in 2D is something really intrigunig.

The point is that: the user has to be able to define arbitrary points, selected on a drawing (using pixel precision) that become the center points of other levels. The position of each of this point can be animated over the time, in this way you can specify the exact position where a drawing has to be placed. If even bones can be linked to this chosen point you have the following chance: you can define the position of a bone and of the drawing linked.

If you use this technique on character that is turning, then you can mark the places of the limbs in respect of the body during the animation. And you can easily build a character animated with a skeleton that can even turn is back to the camera.

In this example the little pelouche bear is built using this technique.